package com.zjzywl.smoke.wx;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLConnection;
import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;
import java.security.spec.InvalidParameterSpecException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.ResourceBundle;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import org.apache.log4j.Logger;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.codehaus.xfire.util.Base64;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;


/**
 * 微信小程序信息获取
 * 
 * @author zhy
 */
@Controller
public class WXAppletUserInfo {
	
	private static Logger log = Logger.getLogger(WXAppletUserInfo.class);
	
    /**
     * 获取微信小程序 session_key 和 openid
     * 
     * @author zhy
     * @param code 调用微信登陆返回的Code
     * @return
     */
	@RequestMapping("/wx")
	@ResponseBody
    public static JSONObject getSessionKeyOropenid(String code){
        //微信端登录code值
        String wxCode = code;
        System.out.println(code);
       // ResourceBundle resource = ResourceBundle.getBundle("weixin");	//读取属性文件
        String requestUrl ="https://api.weixin.qq.com/sns/jscode2session";	//请求地址 https://api.weixin.qq.com/sns/jscode2session
        Map<String,String> requestUrlParam = new HashMap<String,String>();
        requestUrlParam.put("appid", "wx85734e7438a6409b");	//开发者设置中的appId
        requestUrlParam.put("secret", "82a0903181c51037d50f76709a67d942");	//开发者设置中的appSecret
        requestUrlParam.put("js_code", wxCode);	//小程序调用wx.login返回的code
        requestUrlParam.put("grant_type", "authorization_code");	//默认参数
        //发送post请求读取调用微信 https://api.weixin.qq.com/sns/jscode2session 接口获取openid用户唯一标识
        JSONObject jsonObject = JSON.parseObject(sendPost(requestUrl, requestUrlParam));
        String object = jsonObject.getString("session_key");
        System.out.println(object);
        JSONObject userInfo = getUserInfo("p21IdLBINWWpWCfvaPWlq+luVw8xQCIfOs39nXvXbIXEPDkmA81uONQMa5eyosKGQL5X0NywKIEFAZW/ow0cRaTbF7Y3cveAd7OqK2ojWBPg15XYt/5wj367yXxGQgjtz7HJpH7aCBQo9l/BcCen8M7n7pGHADmIJVzD8fgCMseVM1t4NHnixO/jqvKPWCGN9Z3ez76NlcKW+aLZQAw3a4tiRnmDxtAhLxqed6NAfm3ly5o4mgUEJA5aiPnJSVUuJ8UDibJSmxeuFn2ML0dbQJ+B6IeArn5CRRuzeC822cZ6IYh2MRo877RYOLSFC73ivM1RIc9hNTaqKTopqOl8IH8FBUzx0MH7URyoisKwiKRpZeuy+M3y1UY3HNm3nLeRUvGuZZWudssg+DNu3soq1+KgFVWge0Vh4aaL1gys9rg2JZ9f7YQezSwnCrdSYRJgyUiXoHkZduqyMJd1VSsneA==",object,"zY3HY6P2dee0ZX4zGK3LzA==");
        
        System.out.println(userInfo);
        System.out.println(jsonObject);
        return jsonObject;
    }
    
 
    /**
     * 解密用户敏感数据获取用户信息
     * 
     * @author zhy
     * @param sessionKey 数据进行加密签名的密钥
     * @param encryptedData 包括敏感数据在内的完整用户信息的加密数据
     * @param iv 加密算法的初始向量
     * @return
     */
    public static JSONObject getUserInfo(String encryptedData,String sessionKey,String iv){
        // 被加密的数据
        byte[] dataByte = Base64.decode(encryptedData);
        // 加密秘钥
        byte[] keyByte = Base64.decode(sessionKey);
        // 偏移量
        byte[] ivByte = Base64.decode(iv);
        try {
               // 如果密钥不足16位，那么就补足.  这个if 中的内容很重要
            int base = 16;
            if (keyByte.length % base != 0) {
                int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
                byte[] temp = new byte[groups * base];
                Arrays.fill(temp, (byte) 0);
                System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
                keyByte = temp;
            }
            // 初始化
            Security.addProvider(new BouncyCastleProvider());
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding","BC");
            SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
            AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
            parameters.init(new IvParameterSpec(ivByte));
            cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化
            byte[] resultByte = cipher.doFinal(dataByte);
            if (null != resultByte && resultByte.length > 0) {
                String result = new String(resultByte, "UTF-8");
                return JSON.parseObject(result);
            }
        } catch (NoSuchAlgorithmException e) {
            log.error(e.getMessage(), e);
        } catch (NoSuchPaddingException e) {
        	log.error(e.getMessage(), e);
        } catch (InvalidParameterSpecException e) {
        	log.error(e.getMessage(), e);
        } catch (IllegalBlockSizeException e) {
        	log.error(e.getMessage(), e);
        } catch (BadPaddingException e) {
        	log.error(e.getMessage(), e);
        } catch (UnsupportedEncodingException e) {
        	log.error(e.getMessage(), e);
        } catch (InvalidKeyException e) {
        	log.error(e.getMessage(), e);
        } catch (InvalidAlgorithmParameterException e) {
        	log.error(e.getMessage(), e);
        } catch (NoSuchProviderException e) {
        	log.error(e.getMessage(), e);
        }
        return null;
    }
    
    /**
   	 * 向指定 URL 发送POST方法的请求
   	 * 
   	 * @param url 发送请求的 URL
   	 * @param param 请求参数
   	 * @return 所代表远程资源的响应结果
   	 */
   	public static String sendPost(String url, Map<String, ?> paramMap) {
           PrintWriter out = null;
           BufferedReader in = null;
           String result = "";
           
           String param = "";
   		Iterator<String> it = paramMap.keySet().iterator();
   		
   		while(it.hasNext()) {
   			String key = it.next();
   			param += key + "=" + paramMap.get(key) + "&";
   		}
   		
           try {
               URL realUrl = new URL(url);
               // 打开和URL之间的连接
               URLConnection conn = realUrl.openConnection();
               // 设置通用的请求属性
               conn.setRequestProperty("accept", "*/*");
               conn.setRequestProperty("connection", "Keep-Alive");
               conn.setRequestProperty("Accept-Charset", "utf-8");
               conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
               // 发送POST请求必须设置如下两行
               conn.setDoOutput(true);
               conn.setDoInput(true);
               // 获取URLConnection对象对应的输出流
               out = new PrintWriter(conn.getOutputStream());
               // 发送请求参数
               out.print(param);
               // flush输出流的缓冲
               out.flush();
               // 定义BufferedReader输入流来读取URL的响应
               in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
               String line;
               while ((line = in.readLine()) != null) {
                   result += line;
               }
           } catch (Exception e) {
           	log.error(e.getMessage(), e);
           }
           //使用finally块来关闭输出流、输入流
           finally{
               try{
                   if(out!=null){
                       out.close();
                   }
                   if(in!=null){
                       in.close();
                   }
               }
               catch(IOException ex){
                   ex.printStackTrace();
               }
           }
           return result;
       }

}
